NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 817-386

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 817-386 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 817 blocks

Most active assignees, all time — NPA 817
CHARTER IP ENABLED SERVICES, LLC 7
TELEPORT COMMUNICATIONS AMERICA, LLC - TX 1
T-MOBILE USA, INC. 1
BANDWIDTH.COM CLEC, LLC - TX 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-05-03 817-386-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FORT WORTH TX
2019-07-02 817-386-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 FORT WORTH TX
2006-09-28 817-386-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FORT WORTH TX
2006-11-06 817-386-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FORT WORTH TX
2006-11-27 817-386-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FORT WORTH TX
2006-12-18 817-386-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FORT WORTH TX
2006-09-05 817-386-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FORT WORTH TX
2007-02-01 817-386-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FORT WORTH TX
— 817-386-8XXX 8000–8999Reserved BANDWIDTH.COM CLEC, LLC - TX 004F FORT WORTH TX
2007-06-14 817-386-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FORT WORTH TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.